Process of manufacturing vegetable glue.



UNITED STATES PATENT orrios.

FEODdR LEHMANN AND J'OHANNES STQGKEB, F BERLIN, GERMANY.

PROCESS OF MANUFACTURING VEGETABLE GLUE.

No Drawing.

have invented new and useful Improve-' ments in Processes of Manufacturing Vegetable Glues, of which the following isa specification.

The present invention relates to the man-- ufacture of an improyed vegetable glue from seaweed or bladder-rack, agar-agar, or other alga, which forms an excellent substitute for glues made from bones, leather, and cartilage tchondrin).

Our invention is based upon the observation we have made, that by treating with a dilute acid the colloidal matter or gelatin of seaweed, in conjunction with an agglutinant, such as dextrin, or an astringent, such as tannin, the gelatinous mass acquires the adhesive quality of a good grade joiners glue. D

The new vegetable glue may in practice he nuinufactured for instance, in the following manner. To a suflicient quantity of water some alum, or other substance which promotes. swelling up in water, is added,

and about 500 grams of bladder-wrack or other alga placed in the liquid and allowed to swell up. whereupon the water is poured off. .The mass remaining is then boiled until it has thoroughly dissolved, and there upon filtered. About 10 grams of 50 per cent. acetic acid and 20 grams of dextrin, or 20 grams of tannin, are now added, and

after complete' dissolution, the mass is further treated in the same manner as is usual in the manufacture of boneglue, heat being applied for a considerable period of time.

For the urpose of depriving the product of its brittYeness, and thus preventing it on change of temperature, from cracking. and scaling off the surface to which it has been applied, a certain quantity of glycerin or glucose is added.

The new product, like animal glue made from leather, bones or cartilage, is not only suitable for uniting wood, etc., but can also be employed for divers technical urposes. For instance there can be made rom it a gelatin for sculptors, or a mass suitable for-printers rollers and hectographs.

The new glue might also be prepared as follows: .The seaweeds or algae to beused I! are dried and pulverized, and the resultant Specification of Letters latent.

table glue, consisting in treatin powder treated in the manner as the seaweed-gelatin in the above described process, without the cellulose of the plant ,emg separated by filtration from the colloidal matter contained therein. In this way the entire plant can be utilized for the production of the glue.

The treatment of the seaweed for the atented Mar. 3, 19.14

Application filed July 13, 1909. Spr'ml 110. {$401.

production of glue difi'ers from that in the familiar process of treating the same, inasmuch as the seaweed mass is'm no wise attacked or decomposed by the action of chemicals. such as acids and alkalis whereordinary joiner's glue.

Although definite quantities of certain ingredients have been recited in this specification, it must be understood that we do .not desire'to restrict ourselves to such proportions.

Havin thus described our invention, we

declare t at what we claim as new and de-' sire to secure by Letters Patent 1s2- 1.. The process (if-manufacturing a vegetable glue. consisting in treating seaweed with dilute acid, and an astringent, sub stantially as described.

2. The process of manufacturing a vegethe colloidal matter of seaweed with dilute acid, and an astringent, as tannin, substantially as described. 7

3. The process of manufacturing a vegetable glue, consisting in treatin the colloidal matter of seaweed with dilute acid, and an astringent, and in finally adding glycerin, substantially as described.

4. The process of manufacturing a vegetable glue, consisting in boiling seaweed in water, filtering the solution, adding dilute acid and an astringent, and heating the mass fora prolonged period, substantially as described.

as I

5. The process of manufacturing a vegewater, pouring ofi' the liquid, boiling the a prolonged period, and adding glycerin, table glue, consisting in soaking seaweed in i substantially as described.

resultant mass in water, filtering the solu- 1 tion, adding dilute acid and an astringent,

and heating the product for a prolonged period, substantiall as described.

acid and an astringent, heating the mass for In testimony whereof we have signed our names to this specification 1n the presence 15 of two subscribmg witnesses.

FEODOR LEHMANN. J OHANNES STOCKER.

Witnesses HENRY HAsPER, VVOLDEMAR HAUPT. 

